Attraction and Repulsion between Magnets

Q.

If we place a bar magnet in the magnetic meridian with its north pole towards the geographic north, the neutral point will be:

Q.

You are provided with two similar bars, one is a magnet and the other is a soft iron bar. How will you distinguish between them without the use of any other magnet or bar ?

Q.

When the North pole of a bar magnet is brought near the north pole of a freely suspended magnetic needle, the needle will get ___.

Q.

Opposite poles of two different magnets repel each other.

1. True
2. False

Q. How many wheels are there in a maglev train?

1. Six
2. Ten
3. Zero
4. Two

Q. The needle of a magnetic compass becomes horizontal at Earth’s:

1. Never becomes horizontal
2. North Pole
3. Equator
4. Magnetic equator

Q.

Why should we pivot the compass needle on a sharp pin?

1. To minimise the magnetic effect on the pin

2. To maximise the magnetic effect on the pin

3. To minimise the friction between the pin and the compass needle

4. To ensure that the compass needle will not drop from the pivoted point.

Q.

Fill in the blanks to complete the sentences :

(a) Two ends of a magnet are called ..........

(b) Unlike poles of a magnet ............. each other.

(c) Like poles of a magnet ............ each other.

(d) A freely suspended magnet rests in the geographic ............ direction.

Q.

__________ is the best test for magnetism.

1. None

2. Attraction

3. Rotation

4. Repulsion

Q. The ratio of the magnetic field at distance 30cm and 60cm respectively from the centre of a bar magnet is 25:2. Determine the length of the magnet

Q.

When a South pole of a magnet is brought near the North pole of a freely suspended magnetic needle, they both will attract each other.

1. True

2. False

Q.

Why a magnet has a north pole and south pole?

Q.

Which of the following is NOT a property of a magnet?

1. It attracts magnetic material towards it.

2. None of these

3. Like pole repel each other

4. Opposite poles attract each other

Q.

At which of the following locations is a compass functional?

1. Only in oceans or seas

2. Only on land, where the earth's magnetic field is strong

3. Only on high mountains

4. At all the places within the earth's magnetic field

Q.

If a bar magnet is placed on a plastic plate with pins spread on it, then________.

1. Pins stick all around the magnet

2. None of these

3. Pins stick at the middle of the magnet

4. Pins stick at the ends of the magnet